For those who have used the U2270B

[zehao]

u2270b

Hi I'm doing a project that involves RFIDs and have chosen the Atmel U2270B as the base station IC. Anyway, the problem I have is that no matter how carefully (temperture, time, etc) I hand-soldered it to a SOIC-DIP socket (i'm prototyping on a protoboard), the chip gets fried. I've destroyed two this way already. And I determined that they're fried because the pin 1 (GND) is only ~600-700 Ohms to Output/Coil1/Coil2/and several other pins.

Can someone who has used this chip let me know how I can connect it to a protoboard without baking-type soldering, ie. somehow hand-solder or wirewrap or something?
[edit - or perhaps some kind of SOIC-DIP test socket that's not >$50]

As a side question, I ordered read-only transponders from Digikey but there's no info on what bitstream i should be expecting.

Thanks!

 

[Free_Will]

u2270b project

Hi,

Cypress Microsystems released a new chip for 125 KHz RFID systems(T55xx Atmel/Temic type transponders and EM4100/02). It does much more than U2270b.(e.g programmable , decodes data for serial comm....)and they also provide PDIP , SSOP , SOIC packages(All CY8C27443 packages)

https://www.cypress.com/support/ref...98B02&tid=54A040FA-2262-424A-B14741267CBD1308

 

[SphinX]

u2270b serial

Salam,

For soldering SMT devices.

http://www.geocities.com/vk3em/smtguide/websmt.html

Bye

 

[kerenC]

u2270b dip

I am using the u2270 can anybody communicate with me. it is urgent. please reply at kcineus@gdsystem.ca. if necessary i will call you guys buy phone where ever you are.